{
  "manageEntity": {
    "action": "Save",
    "entityId": "323987660",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x242c983b3d2ee95f04f374af40c39eb3b47fb24f96e839cda801f58066816fb0",
    "signature": "0x5f0846f6c740a5d52a0942774d2b3cea592b92308425ca05e768677d009aad384afa5c4aa6daffbd825c45608aae0ca0124ad80ad88ea488b661c1791460f74c1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}