{
  "manageEntity": {
    "action": "Save",
    "entityId": "67018",
    "entityType": "Track",
    "nonce": "0xe6446f02cfd98baa7f1af08666be907ef4528842963154e58af6e2c777183ff4",
    "signature": "0xdb2f55daa3908c4f04ed69bfb91ea0eea28ed3fd81e759abf34b8e48aa679db8100aef872e66b7b56464813f47a23be72d636346451d7ccacb24ab6237e1659a1c",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}