{
  "manageEntity": {
    "action": "Save",
    "entityId": "892209389",
    "entityType": "Track",
    "nonce": "0x863329c8be439de36467b50b8ca55ff4043f2bfde20826d21d01ac1b68050004",
    "signature": "0xf6142f30083eff0aa020adbe82b3a45b2a3235ad9c390c652e10cc43a6cd384f0784a468a55394312cd9bfc7d3d7404e19d89a0f4a44ddef92a077a2ce08530c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}