{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075336",
    "entityType": "Track",
    "nonce": "0x605841789e879cf8e498592d50153a6c5f2d734107fa7f70d4ea07edcfdb89f5",
    "signature": "0x00fe6c03e32a33662e79444e752c989ff84f558d6bc780ed42022f92084f8b6267481606a8671c395603a99513ff2e2737eeb435d138673e1ecc9e0572cba6231c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}