{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2d1abe46acb59c695cde9afb38c640af38b028d2be5c2534d43201c0cfafc89b",
    "signature": "0xfd9a3c952a69183dd3fe1b3c949a5823758874247831474c5a7c47dfec3530cd156cbe7ef16cfd342343aebc4f3b2b07a762cdcf3daf6ad7582d583ad4efc0561b",
    "signer": "0x925c43F84c8eB1fF20B175479C7AD3438762D441",
    "userId": "561360037"
  }
}