{
  "manageEntity": {
    "action": "Save",
    "entityId": "393130553",
    "entityType": "Track",
    "nonce": "0x0a759ab6f70157ae5fb2f6831e7289eb4b5fd6cf9062cd9969dde1ec13f95946",
    "signature": "0xdbe4d64ca21423d18ffc159f86610f0ddebe795ae6cb70470d8ecae13b29e9f704a3bcdc75bf7cbcdc6e4b32fcf9173e74316653b9b44400abcb6b9219d8e7aa1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}