{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985703125",
    "entityType": "Track",
    "nonce": "0x633dd6e7012abaffc9bba77d6b7b1750be7a3facbb180d991998eb162353e78f",
    "signature": "0x7860f6e47edfa30ef4a91db6481568aa84733ae1a0cc20c2410032fc2979088358f22e1a573321483082db5246d5b35504f30fa4098b3133c8cee3d18702ee101c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}