{
  "manageEntity": {
    "action": "Save",
    "entityId": "478857361",
    "entityType": "Track",
    "nonce": "0x19b1a38dcc6cbf1a03a35616655aeee2dd464120c16818430fe3cfd1e70d6029",
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    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}