{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120874386",
    "entityType": "Track",
    "nonce": "0x64f252777cf5dfcbe56208a2117ef8854fdb6ed4e2526ea8c29b67329437dae3",
    "signature": "0x8eecebeb7f7bee0e1b97285a63528aef023d4dc48b9f40325e74eb2819d3532932e7c3da14a81a0008a807216f9311be77fd401cd4edbeb6dfcab2a6db79186d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}