{
  "manageEntity": {
    "action": "Save",
    "entityId": "28027957",
    "entityType": "Track",
    "nonce": "0xb170db5cedadb726236bb43d6e99e170024643080333fbe8580bb8cdfb42cc07",
    "signature": "0xba88025b8d96928d65946d24461fd1155d1255e48f87f6032a977f52a148efdb1dceba57900e1e474d6651a39e09f0ca6e52f43d3a16f2a09f50f3c9b808db201c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}