{
  "manageEntity": {
    "action": "Save",
    "entityId": "2133980352",
    "entityType": "Track",
    "nonce": "0x5aeea19e9e74f3a55ca478d43b084aeadde16c82bde39d518b220c43abb5529c",
    "signature": "0x92e811d0f3eac2e77e47dba44a8eb7c80c3dd6a711a9928b23a538b54198abfe1fbd6ff44cfedee2b0742a43bd0b77add0d3d9f8e7693abfc32ac9c0673eb18e1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}