{
  "manageEntity": {
    "action": "Save",
    "entityId": "705321019",
    "entityType": "Track",
    "nonce": "0x41dd2e11b3417b2743a8122d352a0b28d82fb49ced7f9af4cd137e1a2ccb4c02",
    "signature": "0xab0358776436fee416ec701afc59092301485fc5d893f0b83b2a5c29b5b29dac7b6d5797af5a1cce5554027115516db48c006fe8322b0148aeda28f8cf6dfad51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}