{
  "manageEntity": {
    "action": "Save",
    "entityId": "2030647032",
    "entityType": "Track",
    "nonce": "0x5f37a7cebe0fbeb6e2eeb603bb5fc161e368d44b80fa81a818e5862b39a6a28c",
    "signature": "0x5f5d71fa91f386aa6ea898a190c7e84781de7601f83ef6e89eeb3f3a97824cd1333486e9f84dd83677435d74ef980c4ca0db7fd01564e57903b3ff90edc3778c1c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}