{
  "manageEntity": {
    "action": "Save",
    "entityId": "702189",
    "entityType": "Track",
    "nonce": "0x362851ee4026b827d62eb1c0a25c2497507eca9b2fd6e6ba323ba80ebb295f95",
    "signature": "0x817397bf05335b8abb6060be616100a6703d9d3e127d19b3f485e850cb8ed7fb535c69e7362bde12044e81de8a3df921246fb2e747195d88bc2ca66b6304447b1b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}