{
  "manageEntity": {
    "action": "Unrepost",
    "entityId": "728365",
    "entityType": "Track",
    "nonce": "0x309d324936b2610f2bf2266ffbb5a97ee8e62a7862d81e1eb0ad2dda77992b49",
    "signature": "0xfef290bfecb0bfddc3a00b812710e13ce09be9c65ca0848344538d743837040471a1dfb361adf7f4abdc73a23e79a0c8377c3d176b1a04aa4eed8fee8870c5761c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}