{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x21b3773c1c2aed72fa39df7be5dfb6be1d2a554c8200476063a51926c076901f",
    "signature": "0x29f893627d88ce622d2ed7b0153099b195bdbd5fc373ea8b159ab0ce4040957970d5e6b427a9c8d566f7759a72f04b5441c4104476a9c24607a3a4035d0833b11b",
    "signer": "0x713F2e5B0EB36E8f4406d30664f8b9fA676795d1",
    "userId": "439116984"
  }
}