{
  "manageEntity": {
    "action": "Save",
    "entityId": "634995",
    "entityType": "Track",
    "nonce": "0xf6b8b509095cae063eaf5f4d0fd678e82349cb96e184cc5a8239e37f7c5f5e66",
    "signature": "0x127e6f19d9d26d5136f7908a6b8926bc64149702b03534dd4ac5206c0f211c035f4f8eb2d93d1b0568ac34e2b41399fd735e4fecda56b6e4e52a5f59e3fd6dbb1b",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}