{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953154181",
    "entityType": "Track",
    "nonce": "0x31a19336731458c6d56e85a8a84b74079ea70d2e15e35ca6e1960598c9eafa9f",
    "signature": "0x2f5f8e770b80f0d1a2cbbf2cf8d7a4317271c7fb006965ac6ffd44b29cf50ace5212e05c54b0a7e00e4ef3cf1c6fc9d24bb996f07dda4d0871ea90f89e67e2c51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}