{
  "manageEntity": {
    "action": "Save",
    "entityId": "335827975",
    "entityType": "Track",
    "nonce": "0xca0eeac5c0911882ac19089f46644b99da6b2be60f662c51d90981a5448cd177",
    "signature": "0x5f8bd604be3c8f7ceafd1e4447067f80cc8666d699c0f7afde1da3042cbbccbd6b788362ce733b5d00143e46d42c0e37853294724ed16a02bd0eea18b42043721b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}