{
  "manageEntity": {
    "action": "Save",
    "entityId": "1443114068",
    "entityType": "Track",
    "nonce": "0xdf5a99abb7393b85ffa1973068f22e5acdad501d54c2aff162501b9e153dc309",
    "signature": "0x8a9245e9ed76c5773eee046163f902bec31bc717d31a04f7dc372779234589a10fdb8e6891eaeee0c7937603dff4061028f1bc2b34b83e053c86b61712c8cad21c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}