{
  "manageEntity": {
    "action": "Save",
    "entityId": "617889",
    "entityType": "Track",
    "nonce": "0x9d1169c6c408312aca49a27334ee51d0c48980a7f8174ff0a3b87d9592af98f3",
    "signature": "0xbe82c651b8b39383745232f24c9c009b83a08e78323fc1cb4b2d26a02b506d156bb5e37ffb927ee265c477c9f2db8e03a60718e755bd01a85ddda9506433ed121b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}