{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668263",
    "entityType": "User",
    "nonce": "0xa83fa97c920c47ada74cf8be14a0e07a903a2a7906395fc9049d7d4e274d1f40",
    "signature": "0x890098871e2c4d407b190f2df1c96dccc0f4330938136124d3a9d2caab995f95666dcad822e42e1e8dfce690a6268e311d2c3b2c8020d7f9b5385a43a14dc8e71b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}