{
  "manageEntity": {
    "action": "Save",
    "entityId": "785574985",
    "entityType": "Track",
    "nonce": "0x5d04258e1fb48ef085b06f27061c2989157a2d3fb93e539c1f223778f6ab048d",
    "signature": "0xf1f41a322712675a8fa80bc2d26c69796b01ca53f594456cecac1f57dea8a215486abb729479adcee1e61a8a7020db306d72fb39d4d0188cb90506b5946debf61c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}