{
  "manageEntity": {
    "action": "Save",
    "entityId": "1136608200",
    "entityType": "Track",
    "nonce": "0xb9bd9afd8b4c4477fdb28120f2924b060e7fd3feb5efd4b0e7a59ebfdda5fc02",
    "signature": "0xc65054c9b6c043b7aea492cb94abcd27ba7575d50075f9567c0fd0ba13aba0227702a57601f2668d2fbd6af94c36a01c68b274689de136dc49c4062026058a441c",
    "signer": "0xEbf223E3bfE29c251Ee19f0d3515DDDA00B0Ad60",
    "userId": "2018345"
  }
}