{
  "manageEntity": {
    "action": "Save",
    "entityId": "563479274",
    "entityType": "Track",
    "nonce": "1792391362590262435",
    "signature": "0x5853f14830491fd2f1fc579b0d1a2ade45d8b38c762fc540b92d5aa727901f0f62f3b07fcae0869f16db4b2d1d81e22cb0dc63b6b2915e9b860c3af3e320c08a1b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}