{
  "manageEntity": {
    "action": "Save",
    "entityId": "1674001840",
    "entityType": "Track",
    "nonce": "0x877a2f2f5eb7f98424b24eebf20f2ea5212145ffe59d6e8d2232361690edf52b",
    "signature": "0xf6dbe7ed4771f9786d29edb18f2fddafa1aefb1e9bddff6c5954732a95c019bd4715661c1a0042b02252974fea98a5e54d6ad489e26992babeb788a44355f3ec1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}