{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x499a0f968db7c237be8990bcbe8aab756c519dc98b1ad445e863f1555df74eb1",
    "signature": "0xc141ecc5105a1e2f5959f0d170b2e292b10da244b96e1daeae9bf8d9a5985ccb1c2e88d940dcb1e580b78a044b964b591c87752488eb39baed34960ce39ac3781c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}