{
  "manageEntity": {
    "action": "Save",
    "entityId": "434712255",
    "entityType": "Track",
    "nonce": "0x623d0aed1bcae4b05807f220dd318049a7ff8530949323a222e59e9cfd3d6ec7",
    "signature": "0x2f19f779584d1fadc6dd0c58d5838db440bfd5f1daf71b2acee7112f1daab4160219bc9c2e8805dd38d4282cc288ddb34537e783bc78d8cdd08fdff058d456d71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}