{
  "manageEntity": {
    "action": "Save",
    "entityId": "1448038177",
    "entityType": "Track",
    "nonce": "0xa3808ef156a98ee4115b68504ed61bd1faf743c24e97abc507699895be19d2d2",
    "signature": "0xbf37fdc5183e21187c45eade0dd4fb0d3ecf239f2cce212f948a2a914bd25c094dbb82c08e82fc3a6a240482e8e75d4b76fc38d5439748c279c7a09bc533934d1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}