{
  "manageEntity": {
    "action": "Save",
    "entityId": "784795699",
    "entityType": "Track",
    "nonce": "0x48d701cb74a739b8f8261ec9a504361c3e326aa71a3d79e2cd95ab94773fa64d",
    "signature": "0x38db128c203e08ed3ffffb4940daf36ab0e65156e6b07ddc5e282a3bf866223554443d557a1be2aa3b6b3d62756f1b8d733434a4d16cd988e9bf74f5ec4467621b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}