{
  "manageEntity": {
    "action": "Save",
    "entityId": "967863512",
    "entityType": "Track",
    "nonce": "0x866cf782f755e640e913b3c872533437e43f76f7c2d04c41eb9033169c232e34",
    "signature": "0x6644d651308cad0e9cd3e66355886f3bfbebcf22e28c2f532ff8a1d95ff156e83cc7516f52c14a20424c7435aab687917df5ccab83cab89108cbc6f60a1ef1741b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}