{
  "manageEntity": {
    "action": "Save",
    "entityId": "188843242",
    "entityType": "Track",
    "nonce": "0x8abfbe1ed8a25d5e7c70caa37aa83e00badc5eff22a13b19e3fe5a60a37e0cf5",
    "signature": "0xc3fb9c061094f2cc30c78e0635813efe6ad889aa201f85019a5127ce235ce4832da0fdf5bc42adf1b7b300193a5b98218621b3c618bff687a9937aef68fbe7051c",
    "signer": "0x7f789C84726B83D2E72dA064Fe6fdb64ecF59F85",
    "userId": "333400167"
  }
}