{
  "manageEntity": {
    "action": "Save",
    "entityId": "193770",
    "entityType": "Track",
    "nonce": "0xb4f5674d8e85b923e29e1c6ec4120ab51611ead12a91ea001e1410a210843d75",
    "signature": "0x7ddb27e3f16a5edb02c35c1f985238b713d6e1ab66ee3d98b0de72ae827e3baf6748c8c766cab2519c2539f46a06ea6f608bbb9463e7d2b8077c8b7963c76f6c1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}