{
  "manageEntity": {
    "action": "Save",
    "entityId": "1902537024",
    "entityType": "Track",
    "nonce": "0x2c89bc038f42c225c5082306c78ada8a3cf1825f0b3ab17e1e3b642e90435d83",
    "signature": "0xa34f8dc51203e1f9709f0e719c26a56fcdf96ad9de259836bdcd507ef8766baf37306449cd1ee92d494f550c909f005d0c8d02c05c26de61cb70c518a997978d1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}