{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "1519789457",
    "entityType": "Track",
    "nonce": "0x065f75e6ce3518e414997b18e6ad1c2ad3506f8caed7a58df09c5a9ac97260b8",
    "signature": "0x8498a9c89ee396648277440cf8819cae0766d9951e767fcdf8af39c9b9339b974c02b06d7906e0a134a7c51db5a653863f9dc69f6d9632240dcded4d194c905b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}