{
  "manageEntity": {
    "action": "Save",
    "entityId": "1130964623",
    "entityType": "Track",
    "nonce": "0x15f42ab29a0c76f01b48e47c9cc1a5900cb4ba3715484f495ffeb4ebef3b848d",
    "signature": "0xda4ba37602ef557a7022ddfa765f3e24883339c017a5d54892efa9914ca8040440bb5c4950add273c1224c6f2828daad099292150ca37955f49308e8104f56281b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}