{
  "manageEntity": {
    "action": "Save",
    "entityId": "184014232",
    "entityType": "Track",
    "nonce": "0xa48af7ec0255dca1bb80be44ce72beec6019d42ada0d3b57d7c7a6fe53144810",
    "signature": "0x0e38ae5497fce2a459c02fe9114fca9c3593a8f68ec5cf1a4ce0ed10d332c6fc1f26dc28119f4cccfa71f03569f5f193610c836a853be4eaf1a71d6c2aa5687d1c",
    "signer": "0x21370B7a703524cC2941323C2c960224021F8D56",
    "userId": "986168993"
  }
}