{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x33d6c6697860ca8114829c1dfb47a522b1cd1b98d0901c07770209a4a0c66069",
    "signature": "0x6aae9b05d045f5362d476d43cd583eacbc2c811bc1f6fec3a62a9e68c4aeeb776736f2f30868e95ae09bd556f79af6c28897a8ff55391348b54179466564f7181c",
    "signer": "0x98a678b2b225c6ba4b429365951929F94ba0361a",
    "userId": "79105784"
  }
}