{
  "manageEntity": {
    "action": "Save",
    "entityId": "428394",
    "entityType": "Track",
    "nonce": "0x3f83ac9c305fbf33e2e34970d8c5b51fc12de1148feec9e792e720d5ebf16056",
    "signature": "0xaa7eb8f87ba9fcc1d91c05d910283dd52d3ad618ed4e9aab57ca8ca14d16dd1d28ab485a9d885c13dfbce3a6a0a7f7b47843756029e4966a1665277d751aea751b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}