{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6853ee939d692e4236120a0ea3e743d4019bc03371bdd7992c026d086cd79873",
    "signature": "0x94389996274eb7288000e2049136d1c6bb7a634d96ebd68a05952d86702281a5742d280eb8424ebeabd1df1eb276409015a2dcb22eede18687d51fc053a504471b",
    "signer": "0x2074DA70847E2FD612f95Cc4406C88196B85DB56",
    "userId": "504638765"
  }
}