{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x39b9d8597719a3e0968547238d706ebab7b2327044130858b1b0fa6cbca2f15e",
    "signature": "0x0774b78af7e9a3f8d877524dbf14ba721194e481da6b3e142ce013ddbf1056ae5610b527871dfd62d83e5d420cd2976e088b6824f1daa12bd7c4c711467aa68e1c",
    "signer": "0x05Fa14948e5d52c3ed23534257EA9AbB5C503f73",
    "userId": "878751743"
  }
}