{
  "manageEntity": {
    "action": "Save",
    "entityId": "37590",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x00fc12cb3b4cc86c22c6ec140c04d3c49789eac9eb2270012eba2bb17f51f0da",
    "signature": "0xdb29b9dc29484d9353050b8758fc1620c7ba012f07d5910cb7214d8bebbbc01b20164bde2b74ae9027374bc000a45826c3bd1790ac88b7080195711cad7c540c1c",
    "signer": "0x92F11f75D0501166E7D3C5D6e090C3557e99cA89",
    "userId": "238956968"
  }
}