{
  "manageEntity": {
    "action": "Save",
    "entityId": "2141504912",
    "entityType": "Track",
    "nonce": "0x2f89e1f34145d93fc95fa17738529e9b036915f6e39ab7c6877ab63568268084",
    "signature": "0x0d08255cc9d27db67daca5d14237787603cf2eed674b621b9fc306b6e2c95d744143f321027b75dac147d1b435e7d3b06e2ace4a9b8d52956815442cd7bc97611b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}