{
  "manageEntity": {
    "action": "Save",
    "entityId": "1284127143",
    "entityType": "Track",
    "nonce": "0x52004f464c64d8f32303c5f337810e86506b19aca5c1e710753f08acf4c031d1",
    "signature": "0x659a2cf289435ef66a13adb939248fd003104f5a8c4d25af95e74815b674d5fe49bb4cda1738a1ef623412b435881808bcacf5db743c9266eec14610aba36d461c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}