{
  "manageEntity": {
    "action": "Save",
    "entityId": "1630300491",
    "entityType": "Track",
    "nonce": "0x5efd251371151faf5fb69e9170a46bca57118297bec50dc211f06fe3c8fe94b6",
    "signature": "0x7aee871a64be62495b7f7c028560dc2baa7f3fb491bcd559c5fda4e113aee0584c9624e1742d20a03fd6edb1d20da81b0396bc947717dd21267bed3a8195ad2a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}