{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3b5918cabf7ffb8d179c09ce5434ec3565ff7a4b63edf2894d89f42fcb101a29",
    "signature": "0x39afb35d5c1a3574bd54ef9537d41bf103930d989f7925b1fca95e8e98c114d9792afc24bf0b4ca11418bcf9b0cc973ff5d47762da59874592eec5e4f62bc5bc1b",
    "signer": "0xADdEa4e8c5E692F712b0C751936884dAe1F6f788",
    "userId": "280479212"
  }
}