{
  "manageEntity": {
    "action": "Save",
    "entityId": "1872366663",
    "entityType": "Track",
    "nonce": "0x94a6c7ac7e79e757538444c6ed756ad8ae78ee4d09f9fd83a50fe0a10926dfc0",
    "signature": "0xb56d431f4f69f01e1768c7c3bf0829b69195812dd103e07f4cf4ce4e6b3081257fbd918523e4830272803577cdb51d254dbdabf116e678b7338614921dce43651c",
    "signer": "0xD7Db519a2A03374B0548c02822bE88402aef1E5b",
    "userId": "715241773"
  }
}