{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961910096",
    "entityType": "Track",
    "nonce": "0x7f95b8adf3d93e60e6940a254145f1f4fe562d74e6424f96b43c360722644478",
    "signature": "0xec0a21a5cc1e47301633dd3cd788e635d33f8b48f0ebca538ea93ea4a4aa3ec449527b17fb8f257fa88aed594e97558597fdb55a6404a92b32ade44daf632be21c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}