{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1a98a34808c733fcfdf9723783e9c9ff6862cf164746bd3c38344658ae7d0fdf",
    "signature": "0xf92c572dfae4fd5d13dd7d68f3506136fd58408366d973d1e00730abbdab004e4a37f53f8107a710ec52e5c7bd477782799296c1b0cd5baf181615bca3f362041b",
    "signer": "0x04483834161F457267c950e4f298e54Ea3D6d386",
    "userId": "469444589"
  }
}