{
  "manageEntity": {
    "action": "Save",
    "entityId": "1143340318",
    "entityType": "Track",
    "nonce": "0xe2614da084a9d53ce521c76187508b93dcda1b8c84b018ab6d8ef39caa3d2393",
    "signature": "0xf64e736e06814a0a94a814b238e9cbd1b40ffcef5f73cd30fb0bf360bbac6c01508b42d9ac77fbc62f61130e2ff865292c6e2f430db9cf4f30e97347e3b079cb1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}