{
  "manageEntity": {
    "action": "Save",
    "entityId": "1395935332",
    "entityType": "Track",
    "nonce": "0xd70b1660893386f9095806131ac2f270f3a049dbc0c0de1bffc2ac054e536d6a",
    "signature": "0xfc6644c203c049ad690aad601cd42c5783f6e560ded6934a402a6d87d2cc704f2e01463e95160a41087ac04bf9b796b46e05f63a61118f6e7d1f92052560943d1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}