{
  "manageEntity": {
    "action": "Save",
    "entityId": "1167931639",
    "entityType": "Track",
    "nonce": "0xa73919315cf2bb2c931a7a5f0dca6da0260ea5b0d388e9adc99cb39eb5847748",
    "signature": "0x0f735d22303aa6b62dfe8209699ca41a84857904e014f6cedb765a167e021399587d93a264ba01d41d17a1703c3cf87378070d7bf96927cedcbdf30fb079f2601b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}