{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904405512",
    "entityType": "User",
    "nonce": "0x2b65f9d046bd0e7109af410ae33c5612e72c0696ec6b445b0eddbe26fe2be958",
    "signature": "0x67e487aaeacac238f80446b6e9f4d0427146d071d2f21b58908133bfed40789529bc0642e6a705bcb716b0648935ff9ba8da1f240fc5f4fbe359513f5f2bc6941c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}