{
  "manageEntity": {
    "action": "Save",
    "entityId": "855220793",
    "entityType": "Track",
    "nonce": "0xa7279d6159ce48779d19e89783c1957a08c2d03ddb642cfa5df45be61c172677",
    "signature": "0x5d7b78b900dd6088e29f859f2f677888ac4a6ec5971ac789e7258ca361efa7a7728a70287c660cb4cf391d38281cbd85e05af580c719d7f3defef521989c14bc1b",
    "signer": "0xC2f75Abe54443BaC80f6e53a97BeB0E4d3a71fF2",
    "userId": "639689916"
  }
}