{
  "manageEntity": {
    "action": "Save",
    "entityId": "313774",
    "entityType": "Track",
    "nonce": "0x9621e7a6364dfa4b18e8671b4a3640595bdc6faebf07951fa580b01b26fcdb24",
    "signature": "0xad869081c3d620561a039f8a38b34c337b7a29af1cb8ba895a3f1f8a313f49cc1c343c3f566e488f82f7ee2289781e09b0dd3ac295224b13bd6be8ade7c883221b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}