{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293293881",
    "entityType": "Track",
    "nonce": "0x1f964a42c258e704c840549445be9c322aea40552aa3fbccee3e38ecdb95d3b3",
    "signature": "0xcf9f7dbb77c90137d9f10c07e72de709e9928a3401f0f6e2df1a5b4ceb62d9865d30677f5eb45c87c78dc37066eede7a4a4e16648a3221d5390663440104fa861b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}