{
  "manageEntity": {
    "action": "Save",
    "entityId": "312307",
    "entityType": "Track",
    "nonce": "0xa4ce13c3057cf3843310af316afee2eb529d95d292000fa0ff742060feadd96e",
    "signature": "0x34bef60aab21372854ecb50e8bc7f93a1a90c59bc9904e93bd7b483b72ac94054cf11ee29755c3d970c395eb517ae2a102993bf8669b5aac987fc078761aeae91c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}