{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "489479007",
    "entityType": "Track",
    "nonce": "0xf947e88f5c678703dc21c731342be3e9f79cb155d2f5955294c94ba745f0b4ca",
    "signature": "0x5f570bd29fe9f4995d8dae69dac35def736aec04caf0a4ae470a1b4bf02c0f392b133c6a4390388129f41089445795b789a722f253838dc409acb93256b7e9961b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}