{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7d60042a4a1b74cdebb043759fbf1d1a0351ee2e7a7bd4300fa70e053823ed19",
    "signature": "0xe7001ec434e920c447d485f2f7b3976d84d82c1ca899b6cf873311135eae55972d4b5cf2015eebcce7d7c7296c7b0e788bc2d114f0815cb224a5b312b54908cf1b",
    "signer": "0x3aE06051CA81e9C223869Eb8E185EBfF05D1Bd4a",
    "userId": "955418207"
  }
}