{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304242612",
    "entityType": "Track",
    "nonce": "0xb163bf783052650e11bd3d4bc25549ed9e3d9ad39fee55c897e5d45c657aac84",
    "signature": "0x56ee469b4e4db095712bcf83bb850abde06482d78d225a864c3a2757139ef9670fcd6475c0c43151853f4b39d66ed9fafd7b021489442e1b889661e1860648091c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}