{
  "manageEntity": {
    "action": "Save",
    "entityId": "59526",
    "entityType": "Track",
    "nonce": "0x7dec91f283a81cc8efa25a5bd6643e580fb7c7ab4c007368f304eec8677fbe54",
    "signature": "0x28217e5d6d8978ddd0a195ad9d9e9269fd261f9ab450f6f41bc406a0948f3811736bd512dca4574277f00e47b9c07dd5ee05e09220de86c78b159fed7def3cdc1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}