{
  "manageEntity": {
    "action": "Save",
    "entityId": "229649784",
    "entityType": "Track",
    "nonce": "1787409361359873641",
    "signature": "0x565bd7efeb7832d65ba5f0d3f818154fa3fd40ffb8792c85ba0b63d80e72e7f162401e12da029a740c700f622b6d17b45386ad19de901032f233d59640429dc61c",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}