{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x46b0d19ef8c9fa603a9ee9437f9ee380d73b373cd7d7d74c748f018cf421954c",
    "signature": "0xb0c903c7b32471967dd421906bb491ef258add4a57d92a9b7733c204894d6882358f165892a1c67582ed474abc6fbeeb679aeb280cfa56653a296bd7dbd2d14b1c",
    "signer": "0x09F85Ca34d9D1932caC1040F3f3Ccfe0e01f4738",
    "userId": "816727631"
  }
}