{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594343208",
    "entityType": "Track",
    "nonce": "0x4897a5736c10d79d90a1b974f15f4fa9f67ddac55f870ce400cdb4f462681c82",
    "signature": "0x3e2439190df024e87507f511e340161e6bcf1b907bda2269da114a68cfd87cb333500b220e17db941167e3d0db77a5e58a8b827f97b1b4b7e5fcb88cd42f3c831c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}