{
  "manageEntity": {
    "action": "Save",
    "entityId": "1166209473",
    "entityType": "Track",
    "nonce": "0x23e6df6fde554dfaf7221d7afb82bad6315a95b4b50363531c73d1a7302a1969",
    "signature": "0xadcc84c57793050a5d03f885f08f36b692857270ebdbb62d39a6e9018432b27b0991fc79b7ef1bb9c4f26ee7a8df816da7c89ed7ed6dd80c8ebd4946c582fa311b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}