{
  "manageEntity": {
    "action": "Save",
    "entityId": "184541697",
    "entityType": "Track",
    "nonce": "0x8e584e9c5c098a097c9c1a4b19a80f2ef64c1176609a569542c26bf23bf223f0",
    "signature": "0x304a38fae894da9aaeeb0be89831a02c7b00bf1b498290c71b2802ed5e67fbde7c67296f628279ff889ccad230bf0873a9b40f32e3e6254a5b0c167683605c181c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}