{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xecda663d57c6512e4c57eb41467529e3413beb4979071bff961c3d7fbcc2a064",
    "signature": "0x3758d3744529df084aa53b58df948707cab5fa1c1356392072fb37178e01efa867402ea6372dd7f86178d855384ae3ed46c4c5532823537e5396ce865fa6c0511c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}