{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7a864f86c3ed3a5e54e6f4fef6d4a3a6dc587127e189860e9ce4f1097fa7d51a",
    "signature": "0xe31560c3ae4eb42887a3a9010749dcf748f1b8a8f3ff5999e263db373ebadb2071820db2b78e2194a408f45cfcf50b8d873b62e2913ed67b0ba18e048805173d1b",
    "signer": "0x37d5bFdb1c5031d4086D3D13687e3092523fAA1c",
    "userId": "623605162"
  }
}