{
  "manageEntity": {
    "action": "Save",
    "entityId": "20529384",
    "entityType": "Track",
    "nonce": "0xcf924de7d47466fba5febe13e37d0e69532eaac4148d44952e511c37f97aae25",
    "signature": "0xe8dda4a8888b5bc2723f1a044b6628eb842a6cc8a8763f8ddb950ea4c8d482686a25bf9f521321c0fe47a537ff3f8c3256e2c985167faf2320b6b71421f9e2d81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}