{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x34b7b7f663fde0f4fe68eb1a71a20a8db6da4060c37ab6464b5d74aeb45928fa",
    "signature": "0x568f7c197d1cc312e268925cf5d752084cc37a0d2db03c7a87bdc3bc088106f1536b671aca7b61f430deee4e39c840ee8e3dae2586a2aad37daa130f12fb369a1b",
    "signer": "0x2eAa174f648269f4b568e7C847559B5Cd718eB99",
    "userId": "834575515"
  }
}