{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "560200901",
    "entityType": "User",
    "nonce": "0xb972f2a320bcba0ef87c6894ee3ad1cb8e29c7573901a54ddffd95b34f2cf63b",
    "signature": "0x797e01c456dfac2f51f9689197ddc975e61cebaebfa64c5302c8beccf6dbfa7f78fb2dd39ec5266a932e1a50e8a3768bfe67b8fb548915d9294e9e2820bc306b1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}