{
  "manageEntity": {
    "action": "Save",
    "entityId": "359448338",
    "entityType": "Track",
    "nonce": "0xf5aa322b814de651ca9a072d3ee20f74dae406448518db52f92b857291606192",
    "signature": "0xb0a7cf71101c4dca97f1d0dd8d2334be9e192352ffb828bdde09ed61a9b129a726a65a0905de09aa6653ba88fbdb264bc42a0171f81267ad08dddbce1d4754001c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}