{
  "manageEntity": {
    "action": "Save",
    "entityId": "1424379453",
    "entityType": "Track",
    "nonce": "0x590f370a5eaad9009c032ba47050ac0a011a68a3d752a0e5a8a5c3eb12868c16",
    "signature": "0x3aaa4a86c17a61590e45352e311c114e92f910188e1fad7da823d386a116e3311b171914ca1bb74728004b0809bc186892c35baef31908420b9ad25a04dbcbeb1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}