{
  "manageEntity": {
    "action": "Save",
    "entityId": "426897765",
    "entityType": "Track",
    "nonce": "0x0fc8d0e09b1a5d93be62ef10efc86f5ec772c94d6d5acfcba0eab9240fbd0c2b",
    "signature": "0x9527d5e394fc837f36b636d9b03c39352369afe0c94ebacd002d6137df1bc98340db838cec8766a28aad87393b447c51813cfdfe056e76f105715fb6c980bbd71c",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}