{
  "manageEntity": {
    "action": "Save",
    "entityId": "188503838",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x12879ee7a6f14b6f2c89278dc7f8319ee4f544a990661a986f0096c5d5214903",
    "signature": "0xb908076c2b5ada3bcce7dd4f51e8fef6e8abbbd2f83de092f278cd73164febda77fbb06c63dc900b7463da4fe8ff303211c7ed2c8ce9ade8d06a656b0afd3ade1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}