{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe3d4e203b1048c88ccd8a022c16b00d6bcb84eb9d45ede815c41dd91c31083cf",
    "signature": "0x1e0084762ea5209fbe79ac0a60f7b0eba47a54d17056f17a684ef56210640d236050a2dbc4ebd3b4a1a943c1d3a7c75d76b7115219baf133cb47a30038dd0ca81b",
    "signer": "0x129EEFaa5407B17830948f58a044f1C49da45015",
    "userId": "858675474"
  }
}