{
  "manageEntity": {
    "action": "Save",
    "entityId": "828568746",
    "entityType": "Track",
    "nonce": "0x25f73c5856da01a43b77e1439de904c281ea300a9b1f906d98dd321138dc27ae",
    "signature": "0xa4a5519307975720de75298a9945be6d55f0bac281da574bfe9dddfff472bdd37d12447733015cd4edb0bd8dff813f2f10be4ec4c667e2daa2df97691ba7d8641c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}