{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x37dfb30187c25a08a39aeeadcb0e69f56359e2868fa2809c731c52db441ff03e",
    "signature": "0xd7815091f8e498e8aa39c19f728c0060b42053bf7d25fc7db92a8ccb2f5ffd86799e730e7fef6057a7cc8a0a4aee87545edad66b7e8dc8e28f383a80da0fd4111b",
    "signer": "0x4237dD047F4b63798150F0C5DFC310aCE561ffae",
    "userId": "547825870"
  }
}