{
  "manageEntity": {
    "action": "Save",
    "entityId": "956857320",
    "entityType": "Track",
    "nonce": "0x5129aa89eb5609b009d4872ce95040dd8dc86dd06660feccc3635562b7c07542",
    "signature": "0xc2a625708c3779733bc8cc4a2b2e2288dc68409829e95c6b308c3e28adf3ffb90beb9ba79db20758e8b800e967f46b690af69cfcb5792f3408c00c2cff1df5771c",
    "signer": "0xb2F02534d11E6A4fCA3BCBe6Bd6Ad1aA049462Ca",
    "userId": "818521868"
  }
}