{
  "manageEntity": {
    "action": "Save",
    "entityId": "976470060",
    "entityType": "Track",
    "nonce": "0x5f52325db9f2386611edf3975a90d89af42614f8ffaba4f81d4f2e86d83c6ecf",
    "signature": "0xaec10e4a28e256e22978abf2c601c3fcd147d044ef5b1c9650133781e47096f15801dc69a56bff321acf8cbe33032cc1ab586454c59af36f401696aee4f0545a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}