{
  "manageEntity": {
    "action": "Save",
    "entityId": "1246453391",
    "entityType": "Track",
    "nonce": "0x112cd526c3dd2bbb18422f6f95f05d20c90d4db5c15128e69194b48a882f4d50",
    "signature": "0xda966d7d62a9d61e3e8b3ab95c714242031e41dc18aaaaf8736b94c099bc39135a25ef18792bc17db0185cc0cc8b9cc4c8042b154c696e67c9ef8428b89deba81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}