{
  "manageEntity": {
    "action": "Save",
    "entityId": "1852830538",
    "entityType": "Track",
    "nonce": "0xccc9540ef3bf4e5a555e1b488c56a2ad8f1b494da5fe2d6d547f8c10ab82e26d",
    "signature": "0x91d414fd4a7473cbacdf88877443f6a83fd39fa69686b7e3300467e3c44bed9516b6daa9b3abf8f461b8a1be4496faf1ed9eee0d62d81c0325aec74b2cab027c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}