{
  "manageEntity": {
    "action": "Save",
    "entityId": "266641476",
    "entityType": "Track",
    "nonce": "0xdeebd1fcb1b9274f4f5c5d2c57791da2db7af33b5597f988fed3749f840b67eb",
    "signature": "0x2baab76695e3a6aa79cab4e1261d50928ca858be2d3743f6439883601ac8f98448b2c70b7c1d15f7945216fda1e9b519602d1a7af19c6f46c8a92772b0a180831c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}