{
  "manageEntity": {
    "action": "Save",
    "entityId": "1628225298",
    "entityType": "Track",
    "nonce": "0x513d91a0167286b799761bf974c762a784acd08d76729574e959a80810d897f3",
    "signature": "0x1e21ac2ea930ce1faae50b0cf8edf7034213cb36bd67cc2294b0080663f28c90777970ba72c59888014f2015782090238ec39f8ebdb6a3fa18d5b0672c40a12c1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}