{
  "manageEntity": {
    "action": "Save",
    "entityId": "212547060",
    "entityType": "Track",
    "nonce": "0x5c5c2250aaeda4bf3824e85e8e71fb8a185a2e2a00f9b08705ea3bc02f748ba5",
    "signature": "0x84486122d9f1e4a1d84d4f252b2e33b035dcf71614edcebeed7da6456d433eff476be140ae404dd21a09fbf5b85061dedbb6e3e0e2ce4f9d174b03a04d632d491c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}