{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "251586",
    "entityType": "Track",
    "nonce": "0xa3e37b522a48a6a55c010dcdb554910e23267b4dbe7534f2627b94781c8f9f97",
    "signature": "0xb6cf56ff173e6863810c075eb07112370f0abad893af903a94e9dbfb4cdc0c9b56def4fe9694f07cecdb10293c7b5497e5c2cb7d584ace4f6d6a8e619eb182c81c",
    "signer": "0xCBD93c75A45Bd07aD5252988A320db64DDe5b422",
    "userId": "257534016"
  }
}