{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "391927662",
    "entityType": "Track",
    "nonce": "0x7a2503490b0e2e3f67e9b72d68559e04c0301bedcb141754496d9e22303a4b57",
    "signature": "0x8597f21493ad0c65c7c2e185103a85f6f6a9f60bd76f23accbaf559c1219dcde50a2f7246f78e772396ce673ca828db007485aee0e6e1259b369b3d32173735f1c",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}