{
  "manageEntity": {
    "action": "Save",
    "entityId": "61945",
    "entityType": "Track",
    "nonce": "0x271a03d00b274b736ef4affd2b81e98e86c55d19e57947dd6e84455a6f051399",
    "signature": "0xbbb756d3e73a7c2ce6d540e54967fbf1d3f5acb582851a2bf180e69c049ff099656c170934bbbe5d5b5e8744897b6d2e0169e894a0d035b6a9a4be9bc6941c5e1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}