{
  "manageEntity": {
    "action": "Save",
    "entityId": "1855867332",
    "entityType": "Track",
    "nonce": "0x5fe959599464ea51f2e8c3661db5f0d994faab177d5840aa3dd744e3a23c2d0c",
    "signature": "0x352d52db68ef1f6eebd3c53adbfbc53610abd811b1cd56370fe224aaf9ddab8577de6a5c2985b5189049551f9fefc4af253da427e1264a2aabf066ce452e31871c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}