{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xacada040b9883674f72bbbec865e68f5a206ab63888d365a4ee808204e9a03c8",
    "signature": "0x83cc73685b82f620462e52734eca8a4fee10f9fc7dc74b3fb7e35cf0a68ebac84acb1ba42f0291bc4e69356532c837414115ba44f787b8bf0763561be910c9511c",
    "signer": "0x9b4847489D5c9512cC64E671001EC3cd21722170",
    "userId": "508846613"
  }
}