{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050599441",
    "entityType": "Track",
    "nonce": "0x29f28528eaa7a67a15752adb2d52a95f3129c9c219282687cc54b428b4e0736a",
    "signature": "0x38cec89f990ff10d96c13788d224410aba565cc4cb52998c61028c1c6e139ff4054ee92061f9b7fe28fd598220a387fdb17f9e59bdfd931122f0ff327158c2d81c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}