{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662563123",
    "entityType": "Track",
    "nonce": "0x9dd08541e176fb272bd821434cb71b8c9980f8aed3cefd014fb2985db0ad15f7",
    "signature": "0x9c62c083d720e75639a978f2a2501e06d52f79840ccea55696b155aeb32f3cb04e1f53b1513c40f149493cb0cec984acb6446dfe8b9dfa19aec299e03fb858b21c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}