{
  "manageEntity": {
    "action": "Save",
    "entityId": "138939034",
    "entityType": "Track",
    "nonce": "0xacaf5a6f4f6233fc39831669c1b95c2c55ca3448616e3651ebed9cd6703cb31a",
    "signature": "0x46c8ab7e453806d41843223ff07d451548d106d7bcb196024c356b165fd0d1aa52b1376c30fed5c3706a3e027410065f2c9976b24e5812660f9e5930fb384bd91b",
    "signer": "0xd85E4A094e4C057572A9D525C9737051A17ab609",
    "userId": "696716320"
  }
}