{
  "manageEntity": {
    "action": "Save",
    "entityId": "51339",
    "entityType": "Track",
    "nonce": "0x20acfd989a8eb3bdf406c7f84ddb929b4427fd510cf7bc537eebe22466a09bd2",
    "signature": "0xe5f00630ca305ed72570015324afe15eb2f1fbb68a01fea0549a2024722357db7f1744d29d6cc12f75ed746f033fe586981ec0c35709e6a9735d78bb0d504a461b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}