{
  "manageEntity": {
    "action": "Save",
    "entityId": "1915294129",
    "entityType": "Track",
    "nonce": "0x8f0b8fc3dc9eba4b2ed66d25d88c7a2ce9994909f3e965b34591643c921d23fb",
    "signature": "0x28f64b14d3e0826bc47c7145d19cf0735d46fa15ab31f5d4ba49f032e8e747360b6f353ee270a44addb51018e3daf15e16a364672c26a4bc8c61d8305fc429a51c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}