{
  "manageEntity": {
    "action": "Save",
    "entityId": "625442622",
    "entityType": "Track",
    "nonce": "0x0b990346ad12162d0a587c3a032955af4087aa258d9efabf22abcc7ad63783f0",
    "signature": "0x270c5978320a723ab8e2a87fedd2950debe388d0a1ec5c89fe2263c8526adc6d48be5fda5f638c73bd19f504676c1bdf6204d2292e38d52caca02363e6e832511b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}