{
  "manageEntity": {
    "action": "Save",
    "entityId": "819732332",
    "entityType": "Track",
    "nonce": "0x78a0a1f16fa7d6c74158256c226a65b4d9e4a6594e71d41fec3bb9a554958a5d",
    "signature": "0x691d1f0e5174fa8418916357a822e88a4c15462b9dd36d2c5bfd50fcbbcccfa14f7de1d8e1631d6c37452bb045467dd5d0a9805bd27ffd61b1ee3eaeeb2b0aa11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}