{
  "manageEntity": {
    "action": "Save",
    "entityId": "384504938",
    "entityType": "Track",
    "nonce": "0xbdaf6fa9f4ce8305ba23bc39689a615f2ab51db4a0bb14644ca192c45f8aeb95",
    "signature": "0x5ad9475da90a54948f18c220ba9e97f645d87b494a19b9b5e3d2d31f6cc16bb975e8308f478bc66900e9b96c452ee8f830fca97207a38aa7f3a58a9e3d85a8b71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}