{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "615881463",
    "entityType": "User",
    "nonce": "0x1b508c3730428dbbe7ac93584d55cf98c1f5550ae6d80ea80530485839ce8b32",
    "signature": "0xbc00bac808ca8922dbfd958d6ad1675ed344dafaf3a5dba42c7cde98feef207102619a55d74548fbfbd38d8633c9977eae743f06362dedab27cce221a7ce6a341b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}