{
  "manageEntity": {
    "action": "Save",
    "entityId": "1194697542",
    "entityType": "Track",
    "nonce": "0x81f6f4b6858ed61bf6ede2c61e04499a279bb47e25e8291207f27976ab1d236f",
    "signature": "0x5197090a874cce924db22a5254a065e6bdad6573900bbba58aa0323fd9ee2751029b54ff5d654dfde938b1a0b7a92c200e1aec437390f7b2597160b6c118b4561c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}