{
  "manageEntity": {
    "action": "Save",
    "entityId": "752131892",
    "entityType": "Track",
    "nonce": "0x106266cbb275f85b49e319736bfb8821dff19f09585627157df04eb86f7968c4",
    "signature": "0xe0d75f2cb8cb4bf53f8e24e3ddf602613506dec8948519f830a242bbfd85e4b32730463c0bbd22a1c8b36d8ad06cff784de2b2714165d1ff29ae3a5654d1280e1c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}