{
  "manageEntity": {
    "action": "Save",
    "entityId": "43362023",
    "entityType": "Track",
    "nonce": "0x4bbe23c8112be79e7acd958c096e5ada5d2232e163e241fde6ec5b25c4c5a510",
    "signature": "0x27ce23c8a5c0eae795a0b2e360b1a0aa0bc270e9f0ccee6eb5db0c97ebc88e7c6ede7c699c27688cc3b60ec5ffc8bc9ced8ac2996a2f5d990b6c75dbba0ea78d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}