{
  "manageEntity": {
    "action": "Save",
    "entityId": "28200863",
    "entityType": "Track",
    "nonce": "0x676271a9222fdfce6b8537970e6448c88b7f17f2bc9365d60738e0e10f03fcb8",
    "signature": "0xd2bede61a75aaefe3c6ef9e9828a894a7cf8acf2671b1a3f8bc5732d64e5e6741d8d99c1b7a25fd7b477438cef51d63a67053ad429134ebd7a9825bcf745ca0c1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}