{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854944736",
    "entityType": "Track",
    "nonce": "0x8c8bb44fc4dbbaa295369b59b2bd21f32815e53d6079b60d4d475dccbb06ea56",
    "signature": "0x32dc2f7a5198c86d7cbd21a6f732d2c5fd7e1312521cd94a7a587b630d3bac4e4fc010dbe6235da783f257d177f5c7644f5fe91c61765e1cc3996ae6c2a94edc1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}