{
  "manageEntity": {
    "action": "Save",
    "entityId": "51347",
    "entityType": "Track",
    "nonce": "0x044fc3f96cf25b3906ededf43a4a1a1bf38d40adaa84a84e67d9546ecaa644b6",
    "signature": "0xc547ca439999b12886b5c5c2904f4b829d28acaa7562dbf522866b9c84595016154cb2ab4bc7427c8219b7419f077113a27935d3c546c9f81351412ca7a0c8401b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}