{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "771775",
    "entityType": "Track",
    "nonce": "0xcbd84a9d94480c025ec5e1e60ef1cd3289fe2b6ac9f0170fab859715548d7a3b",
    "signature": "0xad03fcd9ee7a8754d8c5b654b2430fddcb6a549acb4127929f9f29b7dba8efdb75614ac6f549ae42239d1ed6adf33d7ac9bac051abf2233590d6be2a679ed0d61c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}