{
  "manageEntity": {
    "action": "Save",
    "entityId": "2048634756",
    "entityType": "Track",
    "nonce": "0xb932af0f0f3389596aea9af56c01a238e31991fe301ef8fa353e07f90139042d",
    "signature": "0xdd09c97972b018526b3139e00f97f84ea9640a648d935515ef2332115b79b9271d56551a83699e74a61da0e126e4a42b7e9adf0cd890c621a6b32dfd8601721d1b",
    "signer": "0xE466248f391B5f99247E259e38d4f898225001e0",
    "userId": "260762194"
  }
}