{
  "manageEntity": {
    "action": "Save",
    "entityId": "138455059",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7b5b3e627e999b9d892ac902b850f0e8e32b873fb0b33991473cb76c1c135ac3",
    "signature": "0xe75914e6a99fc982ca088caabdf73c87547b609ce921564f13d4fa185a7734bd21235d232e84aa65e5da69cac56b9a03fe63f28f0fa074c90b9f56589d1030261b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}