{
  "manageEntity": {
    "action": "Save",
    "entityId": "1382017829",
    "entityType": "Track",
    "nonce": "0x1a1db33599619b5a58c1f90cdb2017b37e85bc65fa9a36af64a22ce9dc660ff3",
    "signature": "0x571792a8dfc6052dc620547b54b04e835817703d1b9b195a35d51888920d0d4c65b74cd52475a81ede5d7521151288a69d182127d9c14442cce04e25bf4744dc1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}