{
  "manageEntity": {
    "action": "Save",
    "entityId": "1156225192",
    "entityType": "Track",
    "nonce": "0xf169b288207bbb23dea00504c6cd740694875e9278476a94c67c550d19dda0d6",
    "signature": "0xbabd90d88ce3d1d60ec8f34a47b0759164dce565d166500a761eb1899a0d0f977a04b3e73c665a856fbc95c25129e01bb60a36bb8f37c42fad0f6e1aa49dbc661b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}