{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678225037",
    "entityType": "Track",
    "nonce": "0x00a90de249f5edfa055847d5830b6747cdb01feba1472783d666ede18ebae3e4",
    "signature": "0xe2146fb3d089b521b6f5eaf6d12652caaf53892270c152d7618325b0bf526d8d5f6a4df8adc312eb1a2f071d1a67caa4dca98d6d7f2971729dbaebc0a2c38ecf1c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}