{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "748025521",
    "entityType": "Track",
    "nonce": "0xc94477bbf32f06ffad0b3e8e1225e6dc9c7abe91240aa90914cc5be6e5ba663b",
    "signature": "0x2a27fbf8dd3a9d926ece34b0d93d2a5cfdd4f08cc0a06991c857d89a4f6c1c0523e5362b516e6ce689d31906bac41b9047364e7ff3ec18d41ad1e553fa096e291c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}