{
  "manageEntity": {
    "action": "Save",
    "entityId": "1629906964",
    "entityType": "Track",
    "nonce": "0xbc2f6abe83488bff85b05ef4dd9ec3c8d6b8d64411d19893fddbc126e9440ad0",
    "signature": "0x791eda3fcb7991639d2b29d31015ac5602f4006bd97ab48bb87bddeb2969205d63c9c286a08cb9fc999706edc029f6f6fe5dbfc28dd1787165f8f768674a34821c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}