{
  "manageEntity": {
    "action": "Save",
    "entityId": "978234236",
    "entityType": "Track",
    "nonce": "0x8e761fd5e8d5d9f857e983f31b9bf032eb093a2ac425e62c586201d78b3c779c",
    "signature": "0x0a5c539a10cc4eb3af86ed7bad4cdf4cfa0a156bfcbe8c4f95efe5fbcf4b2a87197979a466ea28e0b70405fc0b528a55688046db4d4d76bcb8cf3b7c7d6f7c551b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}