{
  "manageEntity": {
    "action": "Save",
    "entityId": "310449",
    "entityType": "Track",
    "nonce": "0x935286e44de6f6186e27200d03bdf616be764a232cc53f391cb0985dadb9c75f",
    "signature": "0x8a4334bcfd96b3259bb3f077ae59098ae19fe230fa2cb939607309af9503755f16bdfdbd42d7dc64322bc3b099e6f96f9f70b3e5947eac28bcd0b4d9d6fadaca1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}