{
  "manageEntity": {
    "action": "Save",
    "entityId": "302409055",
    "entityType": "Track",
    "nonce": "0x70eed2e466ba2a65fcb2b22ca7357834370d214e4d2dcaf4ed786ed6bb96164f",
    "signature": "0x64efcdfa0c5f9d8859c021032ac4900846499ea4a01d5b9255d3490f1ae2fae3757a42739c3148918a57a4df19c6bb277371271a239800f159cb3cbf6ad729751b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}