{
  "manageEntity": {
    "action": "Save",
    "entityId": "177195577",
    "entityType": "Track",
    "nonce": "0x37de14533ac88a3f819ad5d5b99dc6aa8a3131072b50c4132d79999ab26178d5",
    "signature": "0x7ec92ae3966cfbf151b5ec1e891363a6262108458f362428776f29f62133b6fc49a31754a56662fdee5292d00dcc5f4c3551457ff36f2981dd1dee68e15358311c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}