{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x867cd75e9653959520080c8c95ef910f2c84a403140a32f84358aea73983cb4a",
    "signature": "0x25cfc935aad062453781dbd7eea764f54f6ba2819614b89003b1d78495ac17dc523af1269be6403ba0b55c9b7c525307e29610b7bdf5ba9d3e4dea81481ac27b1b",
    "signer": "0x8410ae550e371F50E654eE78f3b43Fd696c1a25c",
    "userId": "649036093"
  }
}