{
  "manageEntity": {
    "action": "Save",
    "entityId": "247548",
    "entityType": "Track",
    "nonce": "0xe0d9c0f6487b10cd3cc244dea4f1f54cd2020acd62d2d66a28392fb4447c5462",
    "signature": "0xa24b03db9f0eeae1b645c581771348cb6353581c96013d31aa857cbac37d02df12e647623fcfcf7c0114308f5a1f6428822d5afaa0d926cdc6f438f84143f5b11c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}