{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "302409055",
    "entityType": "Track",
    "nonce": "0x794188dd91d36e97c3e3511bb22d12cecd7bcb80cb17e88caa187ed62bf80c1d",
    "signature": "0x7bbeb802cfeeb06ad45a8fc5574913fcf3c18ca8e72c6304f4b11689745810ea49cfbb901b8f5e52879e9be1f31140f3ea15fdc5ba484d5c0e1c4ef8f35302bb1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}