{
  "manageEntity": {
    "action": "Save",
    "entityId": "1485653932",
    "entityType": "Track",
    "nonce": "1792352781068708074",
    "signature": "0x00786786e061e9c9f28825e3863f21e2def2d050ad3d31c5f0bfdff054acbdbc6764b570ce47aca1bff4509ee5713dace6f1d2fe825d6a183c5132faaa936c071c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}