{
  "manageEntity": {
    "action": "Save",
    "entityId": "1753789071",
    "entityType": "Track",
    "nonce": "0x511ee93b30a17b1b99bdb5435c19d9852885472f6bb8e58fa638d5f1b9e015be",
    "signature": "0x67ce27c4ea091935a935dd012c97dbe9a7e33adfe362700bfbb3a6ec49fbfb0753b4c4bc7e5882ed3a1ad2974c4196da45b6c72bdd3c1df96cc1dafc6e3c66f21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}