{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892665109",
    "entityType": "Track",
    "nonce": "1792453225200031890",
    "signature": "0x4eaf3ee0413cd1cf4a040806642218a3b2f2ad92b5b7bf7404a23d998324addf48087cb9c24d77770f893aa6e2feadfce1d7c01fdf285413b719f42c3e33d1711b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}