{
  "manageEntity": {
    "action": "Save",
    "entityId": "458210",
    "entityType": "Track",
    "nonce": "0x03250bfa1b951a2252e0bffc00a899c8255de1432f176277e2631af2aadc7eba",
    "signature": "0x5f1102bb3fefb58fb7e25905d2b94334b75e2332f48baaa497fc0193202d5bbc066cfb9e1cee7b72042f71b4ee6fa1bc84197f28f9030c330e21f07debb9c6cb1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}