{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6fff5cbdcf9f4797b3f36c35d582c471b0a7e265f44a26f07cac2e5ab8db61c4",
    "signature": "0x066051b16b4198b237969bfccbd035ed162f038ac473b1a83e2e5bdbbbc320ea0946d85756af9041ee6dd08a17c47e48e00da7df019d3ec31ed0d43bc06617221b",
    "signer": "0x607C0B504B1190F4Fa45D4712D4449C62F7224E7",
    "userId": "870305968"
  }
}