{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c5078b429f159224f391acab22c9abddb75eb76f5cb83a61e77939555398d52",
    "signature": "0xb7a7a2b5f40fa767d507749bbc33b1c0ab5aeda6895cf541472f6712c7963ea11fb94d2bdb71a06f355ba7c1d8116d366cdef9a3d392958cb88ca27b632fb59f1b",
    "signer": "0xe8BAaf9d67869BFe993951C60524b67BC331bac9",
    "userId": "75683930"
  }
}