{
  "manageEntity": {
    "action": "Save",
    "entityId": "156229",
    "entityType": "Track",
    "nonce": "0x8c4d3b4ae384fe36087af2c132c0abe5540dc5e5f86d057259e1f4c6d7d32252",
    "signature": "0xc19395a7e9ace784b272b8177b40d7ca4b6f06e3dea08a3a9c3190d6f5e1c2347ae75566538ee9744c3d58799be186129fe4ff81e25a52ffda807c5655f9b5cc1b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}