{
  "manageEntity": {
    "action": "Save",
    "entityId": "350384595",
    "entityType": "Track",
    "nonce": "0x9b046b51c74e5b3b7cf41ecbc12519f21b4afdba55859bcb67eb76623dcf316e",
    "signature": "0xfc814ad42a520e242d7b3cb3156aecec1becf6f2b70f5a82918bed079739dd1a39f4d4c98f0aefde68302dae66655ad07ab6f5f21856991e6a80cefb91e3ed1a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}