{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "150500",
    "entityType": "User",
    "nonce": "0xc813b5292c710b131d734d0b6076d8949c9bd1ab9e75dad36943651f06bf9f8e",
    "signature": "0x3a7c5e0591c7ff142fe7158737933679612808ddfd65d8c33966e2a16b9b7dc11dad445315cfc944da5c36065ae072a2e04be4b12c7a3c6d973c1fb86a5ad44c1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}