{
  "manageEntity": {
    "action": "Save",
    "entityId": "841277509",
    "entityType": "Track",
    "nonce": "0xb21dbec6cb42cbd3d8997e4026b587969661aa3509e9557a5df48e244bb16778",
    "signature": "0xd5a7644ae57d8f4d16a3f63ebe9a30496b6ab128714b57ba6c8d95432373845333d1d94b64e6839969082fc70c15d0bf1a607a467f32d7e5da6e0d2cbd8568a01b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}