{
  "manageEntity": {
    "action": "Save",
    "entityId": "1037154",
    "entityType": "Track",
    "nonce": "0xed0ee8c6dd6c562c3f4ad03e8a1dccef6a7149a2b96868e591e38fe3ac0ca58f",
    "signature": "0xee9aa045c24dc6af9a7122c521cf455c60b0b48ea971f4227e6a25b838ed150936d131a2f1e2de60f24712dea47f19d8064623a408533f4c585a3320a07467351b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}