{
  "manageEntity": {
    "action": "Save",
    "entityId": "1941979964",
    "entityType": "Track",
    "nonce": "0xc6c319806306d20b4c9286edd714a1ad148d42bbd16a5323c4aefa23903f1eae",
    "signature": "0xd19c635ad54ae824ceb2d485651d63c00f26e6bd6d1f0319c4f56040c7162cfc26a7e4a4ca7427e1a874db548ecd789093db9d5c8fc1fbf8326f4e8d935fba551b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}