{
  "manageEntity": {
    "action": "Save",
    "entityId": "1209764405",
    "entityType": "Track",
    "nonce": "0xbd6fc84dba77d202b93b7a2254418d1f47d1c4b7aba67f61f8f7e1f8c9fe04ce",
    "signature": "0x161fa824c8f0eabbe2637ac4bca4a4f49e3deb3d9dac151b25025e9c33dcc6ce17dabc940b44ebd6ef49c96f00477885a617d3de02bd4ef0d228b82fbd47fe441b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}