{
  "manageEntity": {
    "action": "Save",
    "entityId": "101669174",
    "entityType": "Track",
    "nonce": "0xf78eb5b969cb502bfe2d9814e6693ede0e9d2e45cfb665afc1b60c404e9ff2a0",
    "signature": "0x284ca52f08657f1679d897f3bb3f81cc001dd6344941bfbf8373f3536620711913ed8aaec8ae1e11646d36d48bc2df24c4738100bd479e5bb0686e0b0e70955e1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}