{
  "manageEntity": {
    "action": "Save",
    "entityId": "233572",
    "entityType": "Track",
    "nonce": "0xf2778ab59ce4b484d921ad58ad483060f7076879fb2ccf06c6e3a011665bde67",
    "signature": "0xe59ca2fdadee429c3c48dd6bcf93b9bb0a88ff7b85f60336f66e2df0ddd527b01415dd156d245dd138ce6bd76744820b00523524b454ea19ca75d2b82fa69fdc1b",
    "signer": "0xE22639FD840080b20889373FEa6060B4757eB9c1",
    "userId": "274627911"
  }
}