{
  "manageEntity": {
    "action": "Save",
    "entityId": "2104967090",
    "entityType": "Track",
    "nonce": "0xad51273275a7f59ed179793aa8d68b9f178bf3430c8ee3f60440972e48d08caa",
    "signature": "0x49884bb893680455590e1bdd6a03ed3d9a9015ec09e19a0311166385aafe8837745b9a14dd4b5a841cac4c978aeb75086f5feaa65ff32e296bc6ff0f6482900e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}