{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe7dbe0d890550a665bc5c9d3f3eed728be8b63d8f2150e5e4234e471ccc53609",
    "signature": "0xd693bfc068e0c70a446fa6ef8c8de38aad03d2707488d584c379179f717610945f9fbd9b2a1f1e71d1caeb23ddcf09aba1843a03e568b664214a9dd4d73db5ad1c",
    "signer": "0xB60F916E7a1c9269b7aB9CD83A0530780f4e42E6",
    "userId": "358472473"
  }
}