{
  "manageEntity": {
    "action": "Save",
    "entityId": "1342309313",
    "entityType": "Track",
    "nonce": "0x3cb4109d4a4224177b0c62ab2549f2bb66fa540596841bdf7ab5e2148204c084",
    "signature": "0x79b62786083c3c258f9c714e9a66f5090ab87d05493f1b2bd4249e8d15bde0d45ea2c81e8c1f939c52e227a7e95568c82d8f30b219cab4fe6200b591a1fe3a3c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}