{
  "manageEntity": {
    "action": "Save",
    "entityId": "468677951",
    "entityType": "Track",
    "nonce": "0x7a2f8920302a14b0ba8aeea03f72f8cacee044861c889c12328e910c9456cfd2",
    "signature": "0x7afc4fae382a7fd7c1dbda8349699d2fff9d3db584f285a7a965567d56d363016b27c97093c1ecddc3a6060189cedef2dac4e10d5ed1f98cef320b01c7c5dffa1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}