{
  "manageEntity": {
    "action": "Save",
    "entityId": "62979986",
    "entityType": "Track",
    "nonce": "0x8e49e60b7367ddf66f5bb64025714efd60d93beeb120bbaf7d5b618935f12622",
    "signature": "0x0c3bd9fbbcd0815553f80b04682cb572659fefde23dcca74ecc8e2a0fca122b37a1ec6eff21e26b9c28b1306d5d2531774af856b5c5a55b5d1ce0b91a4da9bd71b",
    "signer": "0xB60638A16dB9440769D68556a99A3D24d3F7F26F",
    "userId": "137494"
  }
}