{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7324e4809f6ad23c5eed47cb552b79c8eb3ddf14a57676c475422811e114a559",
    "signature": "0x99bce7a5c28488db66c104661c7be61c353808f3acf7ca2690798b6d319617cd6470df656bc6668eff7b3937762e1f02904250c7bd7019d178a3aea9a97be7561c",
    "signer": "0xAd33018d1AA234072Eed7f991F9891f3688158d3",
    "userId": "413212044"
  }
}