{
  "manageEntity": {
    "action": "Save",
    "entityId": "60473361",
    "entityType": "Track",
    "nonce": "0x1839971706c100a3cefca2c3bba36ec35781008a00ebc6f7325603de824cd659",
    "signature": "0xa83d71bbd9275df4d30846d48eaae21376a87981bf4abb21a34ad6d649339aaa40bb07672f3a1e9dd2deef1cc7844e933ccb840c5e81049925a0fc8f910c196c1b",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}