{
  "manageEntity": {
    "action": "Save",
    "entityId": "1666588201",
    "entityType": "Track",
    "nonce": "0x1f10b0b823e6a45c2c013cfdd71e5658bad707bde6c9b9694781d265c718e8f1",
    "signature": "0xbc9716f14eb208b24adf0715c5dcd0f4a27f331e8d5251a4de1989f38dfa5ef5053b4c664812b328aabfa3d46375dc966fafe33e64a58b2e0abfd27f58ad3d861b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}