{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x737969605b104a1b8e06d74c0fbd92e01f038255a322e693fff3670e2f1f0366",
    "signature": "0xa4ae71218b3298c1f00a19907369696dfe177baad8ab9389ea9981be79f85361266e51d3f40e8c3187d018eb7bfa35c305ba1b6a74addf5ad8a062990776cb991b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}