{
  "manageEntity": {
    "action": "Save",
    "entityId": "1228715039",
    "entityType": "Track",
    "nonce": "0x3277d8eeeec30ac1203c6148fe63e7db1006f60a3d18838007e79fd3f8f9f1b0",
    "signature": "0xf5ee6e3fe55a0c67e1c6723fcb3ab294577db4c57f813c97a45cd8d94d211017045a247905ae692ad8f643cdf4692fcd6262c0b9962df5b6197d6eca151815321b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}