{
  "manageEntity": {
    "action": "Save",
    "entityId": "588619325",
    "entityType": "Track",
    "nonce": "0x77b6f624b3c3de47829c12949ab1d18c26c2af0aba0538826cf7a58e74929174",
    "signature": "0x615974e7be4da01c17ae33ba2e526a3c975e61f9699af0c3bf17a35e58d3e7bb35f6469e5237e7a3f837b7120dba5ca96a6d5988af68728767e9f9d11eeef2761b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}