{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199643279",
    "entityType": "Track",
    "nonce": "0x26f1fa0b335b5657082cebe2d7c5f8ae791e7eb992ac82604b18573d2cf05f05",
    "signature": "0xf35b14ce806d0d6023ec785d60f5c2c2263a1dbacdff274c10d459cca57891164465b19dc522f9def69ba50a8a5bc36d15f6a89c4d90d894d57bd2273d2db3501c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}