{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe11307d1bf88228de10e2e3ab6dbaff25c34fdb1ddd2857e70424441c856f227",
    "signature": "0xd7d96b77c8316fa1a16b7d02fbe89e0435dfcfbe37fa7401780e635ddd4670800cfebf4cac0dcb99449c0235dc61be979118c01bea5cfadb409b2db9e336ba451b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}