{
  "manageEntity": {
    "action": "Save",
    "entityId": "955591146",
    "entityType": "Track",
    "nonce": "0x593868a0eb7a9a60b4756d33f8be5b5595de1fc00ec7f509934e1620262cade7",
    "signature": "0x99dc5ef5aab3eb462ddced1be285dc67b5279c2bf9226b88833311318cc749d26066fff24db31483679bb350cca4a1e3b530ffd24be59c5ba0a239f5bea136411b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}