{
  "manageEntity": {
    "action": "Save",
    "entityId": "243509182",
    "entityType": "Track",
    "nonce": "0xaa5549d2024b96135aa0b102db0fa878f843940b76bced8f3e1ea8ede4303074",
    "signature": "0xfd94007537c53f66aea074cb5fc227be08cbf6567d523aa0e211fa62e8b2cfc14c0311d56d67cc701470a277b3e980f235aabec0ffa972c1de066bfb434cff541c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}