{
  "manageEntity": {
    "action": "Save",
    "entityId": "74546",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x220fa693581f28fd419e486f014063d7983557420bd223a9992be189688e94bb",
    "signature": "0x5aa1be03c34402f8aea4359371d691cc33a0250151daccc2668638c7cf81204c4eb455c95f5e2f02b18a00ea202347ecbb8e6ff208e7482a65aa34a5b46937011b",
    "signer": "0x358Da94f2C71F6bCdE7e9De16B2Eda938de80A40",
    "userId": "290271473"
  }
}