{
  "manageEntity": {
    "action": "Save",
    "entityId": "1924835561",
    "entityType": "Track",
    "nonce": "0x53f2722ae826dac0751019702f15915d0015dca1cd87acd3740fb3fd312688e9",
    "signature": "0xbb60d62c4d7f7d615786393ef85df6d46a7b6b35f126598674e99f4056ecb5e65a9b5b8cf4854f98925c29bf4fbc7e51f87fc36beb6e356240626b77ca500bf21b",
    "signer": "0x4e636627B2C38e64C8D3aF5889767393B4fE6C1A",
    "userId": "181"
  }
}