{
  "manageEntity": {
    "action": "Save",
    "entityId": "1090147626",
    "entityType": "Track",
    "nonce": "0x664cf4e99f26ce643d5565144641c2736cb8754fbac6c44eb2609c587d31eaa5",
    "signature": "0xd5c31de43539c7723ac3ba478ccd72082a4f95938f2b357c21a4dfe92c4a67bb6979fd11fd0cb50e7367c2fb80d5ee273f057d711ef3a417e8982c02ede409021c",
    "signer": "0x334b140fE9d685A0b45ADF4b1666b979432E75c7",
    "userId": "550101899"
  }
}