{
  "manageEntity": {
    "action": "Save",
    "entityId": "817319815",
    "entityType": "Track",
    "nonce": "0xa56440abb3c16b433d7c704ac8f81aa415e178c8d60c439e5b085ac087150704",
    "signature": "0xfd00fcdfb7b64c994863fdcd91c4d4aef59c2027078d3a813636b710f22a75120547824ee94fd505710e50d18f542944d63dc053053a01ef68063c969dd0b5f61c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}