{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x00ba881448bfe890ae87372508de7f3246f7efde8fa8a9e024ed52cd4179db74",
    "signature": "0x5b2428aa57455f5d78a3011d3cb6f848073a3105c65d07819c3e4bb9399cec532086d50fb2ca2395ebc00357db769b4a0d5202f3cf764914c6c32322d8fd2a971c",
    "signer": "0xf21b3072f43dF317d8C9C0e4eB5c6204d87E89A7",
    "userId": "586626654"
  }
}