{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1b5d129bfb62f7c57ddc0cc54e1c5c13562cfcf89f335ffb2e19435df926a6bf",
    "signature": "0xe4d1c0378e6b65dbad9aa27dbf1f7805af7ee8b5c71bff2f74ea1d117909046f3bb7fff3b873e509af69c34d65fec9346a1d8b62469427c0f70f2cb1be6fa4f81c",
    "signer": "0x211872dCD6ad84247bC3a976854B885508634f20",
    "userId": "424479086"
  }
}