{
  "manageEntity": {
    "action": "Save",
    "entityId": "558249234",
    "entityType": "Track",
    "nonce": "0x6d9b44e858f453c12c13de21964a1fff1d31f7c5a35bf027bdbb9fbd2a3e7007",
    "signature": "0x7240236c677d5ed2c89cc4758018b03fa982fb6875e4decc07803d777493878d01c389566dc59f38f64341c61a1d69cb9aa8fe19d32f47110a31b9e8dce081181c",
    "signer": "0x36FE3d24284981316dB1bd72F676C29F45F0C339",
    "userId": "73554182"
  }
}