{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1d6d00d56408d1c41f0f91db2d45e558ac8c3e6e106236a0edfe7a756cbc394d",
    "signature": "0x522ad3d51f564144bb66c443e10e891d3c1783ef3fddc70db0bf294447e8fbd920c4ecefab2a75ad5c9e8f9ae1cb92acc5ff27ec5d077bd44ba4451a958d96851c",
    "signer": "0xce94e7Ee987Fd1e98e49175554ec9aBa4969dd06",
    "userId": "874488069"
  }
}