{
  "manageEntity": {
    "action": "Save",
    "entityId": "55119",
    "entityType": "Track",
    "nonce": "0x1d991283dab724bccd743bdda9af4c149f8cc9091ef9c6f2771a536ca2355e07",
    "signature": "0xf15548f2d3c27fea70fdfa2837a7d9b76d665e7db4967e7d89de81eb9c1edec46553d85d8afd31dec9c5c5ac9a08c533387c5297c41ee61b0b4a027ce62526261c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}