{
  "manageEntity": {
    "action": "Save",
    "entityId": "448847181",
    "entityType": "Track",
    "nonce": "0x00ceb6c8e8248d39277decdc95d7244fa6c332d179f436523b0a839c99e7ba65",
    "signature": "0xad67a17aa3d81bf7bf94f722522acf17e88e1ff7ae2a5c067693790ce664e09f63839512ab3e02895a35930ef7a4caa6adfa3ded9f7c630e8d34eb01339e4f061c",
    "signer": "0x4993C3631eecd6e8c1635351A99C2103C7d6Be4b",
    "userId": "906184213"
  }
}