{
  "manageEntity": {
    "action": "Save",
    "entityId": "1573675014",
    "entityType": "Track",
    "nonce": "0x086582a09a1d06392fcf3948729deb960deff09fb450d2139f85d51bc2576c8a",
    "signature": "0xec4f2531c260169d434ce5535028c9957d4dddabd0f2fe79c298b58f256dfe5a4e67537519956e1f9e2265c8966995681f4704af9567b32d2cd09356e56691631c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}