{
  "manageEntity": {
    "action": "Save",
    "entityId": "1242639765",
    "entityType": "Track",
    "nonce": "0xde44e3d2a63461110c3a62fa2853c43d24aae5723b481512e27e554c4dec4046",
    "signature": "0x9cff840678491ea8fd5fa2153e3177cb39f27cda868de99d010455b96880050c0eafcc879f2e066a11bebc111512d44421ebcd6573297e61594874108b586fbd1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}