{
  "manageEntity": {
    "action": "Save",
    "entityId": "1493538803",
    "entityType": "Track",
    "nonce": "0xebf3a9b4cb065228377e20307a1de1c91e5954f38fb1601903e15fd2e75a2c8d",
    "signature": "0x0c24c16dcd736f0b5752de35f85965936185429c1be9b3c729ed303eb74915d82ba1f3e9acfd1858d3cd07d12e8ebdd9e61b58b641891515d6a0a5a33751920c1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}