{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "321125425",
    "entityType": "Track",
    "nonce": "0xd42f3cc82a9482516983adb12aab726077ca830a6603aefcf700c0fe40ee0f0b",
    "signature": "0x1b4940ca475212d73224f731d0934df66290a454280527054feaa06804242f780043eec743b6a73181eb6d0b0ecc05bce2bca106b5a4381b0aa01fcbfceac5e31b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}