{
  "manageEntity": {
    "action": "Save",
    "entityId": "252741506",
    "entityType": "Track",
    "nonce": "0xc8e8e659238abab72a9eea4d6da03a51ef88b5bf88ca8539125f2dea17a0fb8f",
    "signature": "0x48aa9e7fbe9dabfe3bb18a67ad141fc46ba6ef206f5044e58e17a2de628459ba344aec54770928b3ea1637995ade2326c2f8fb204a099d47f99cfdbcb52e95581b",
    "signer": "0x19ee5E3A31ce66CE689e96b87E3583f3B75fD98A",
    "userId": "124060"
  }
}