{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x055cecbfa16450ce8bfd71575b2473168cca71f96626a6e5235697e11417d123",
    "signature": "0x5714a35672846122af06f549e19b938f21fd3e9182ee20c94976ace3b695916226d1a93f7dee5fd2f33e950c618bdf0c2e7a9b47cca8794feef1a1773d3083231b",
    "signer": "0xa228dA0794005c958cFc691a6808417E21E60Aea",
    "userId": "151623966"
  }
}