{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390502",
    "entityType": "User",
    "nonce": "0xe263a1cc5ceb63cc634eb7afbf9db930033e2941f92bc966bd7eec3835a5c193",
    "signature": "0x2d0927b70efaecb61005e42e84e931807fbc626092e8439a67fcb7cf13f8ecc907a90f8a1349f8b9cc60a5dfee01a3f17cf495686d41f9f67fbf98fa07a354ed1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}