{
  "manageEntity": {
    "action": "Save",
    "entityId": "363258",
    "entityType": "Track",
    "nonce": "0xc25da2e09cf01ed495dde36494dcce205599bc9b0de24e123aeece3ffe4ce09c",
    "signature": "0xe798396201af2b97288c692042b2de7c279cfe24a0e2edbb2c9addb9970ae2d244e2d1d79842d65324e96a72ef7205fb210d797eb6ad03975391681e079f0d081c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}