{
  "manageEntity": {
    "action": "Save",
    "entityId": "1009249513",
    "entityType": "Track",
    "nonce": "0x6bc964b540e4eee89d6df6960cf4c5bf4eae9193b6b91823e43530d8a829a490",
    "signature": "0xc1df77e2651b6e61f5085e942676406c1449f6f430a4bea89fe7874f99d214ad3e171c8738469424dd3dec8b09c7e2ac93c7f311e1baaf9240487dfbfd4b39bb1b",
    "signer": "0x024BCd5C5886aa6C186caC8992efB51A7EAFF5d2",
    "userId": "895637976"
  }
}