{
  "manageEntity": {
    "action": "Save",
    "entityId": "463530",
    "entityType": "Track",
    "nonce": "0xdeeb0dd68bd37c008ae8eb7e7c2b3151e7f9c9938a639b016b4088a240519c96",
    "signature": "0xf4eaf950828ee738e5ee9219cc6a59d04b4ca4083fcb4bc5312cc2f1060efd073286682caff7cd03730620e854f3289728131f5cbf55b584740e5eabf934c8621c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}