{
  "manageEntity": {
    "action": "Save",
    "entityId": "577276",
    "entityType": "Track",
    "nonce": "0x74bd573953742523801263d30a9094c6cf8c376c0bb049f02bc8c8894541fec3",
    "signature": "0x0a6b576531b56e4a5b0e7411a5f009bb122ef256b5094e51e759fb60082bcb8f4b0b527e6ac0c2338966e499a4fcacfc86dc4def13b91cbe77248c01b115cb361b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}