{
  "manageEntity": {
    "action": "Save",
    "entityId": "1905326049",
    "entityType": "Track",
    "nonce": "0x77760aef4ab9d4b10a8f72c8199379bf6f1ae66dcbc52f4391ccd4292b4b564e",
    "signature": "0xd8eb73c06002def849b196bd77cbe4154e8ef38b9cd58cb0d6b58d0f2fe57d1e396c85474a29b61962ec4a8c1cdd0330596aa77c60a94d6a216b3996611e96431c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}