{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbd86638fca9132203bebc0af45951e6d21c197e56bf9fe953ffd78d8994af2e5",
    "signature": "0xecdcfb2bad141d1ad0cdd3d65053ca4198fa265643a6f920d8a8f0beb66d65f14c610d1189844f7f487736b6ce1f7ef0de6a0336ad46c8aec129fdd9ae438d681b",
    "signer": "0x369e141491ccFe62c4bc4c6b3f30fF1AC366246C",
    "userId": "135194714"
  }
}