{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5fd39abc14bf165999ab6533afabdbdacb4f827904093a726dc45301b0cfd55e",
    "signature": "0xf53cf351596e905d7d322b562f379d135b771cf034732ebe753bf4e308c86e44496877afbfe0b06e7e4e1aa60a93612e96f58a926d0a1c9b8c55671cee03780a1b",
    "signer": "0x26C6e9F9a6E3854dF4bC2e62742f128a2C9d9BFB",
    "userId": "465074020"
  }
}