{
  "manageEntity": {
    "action": "Save",
    "entityId": "190942073",
    "entityType": "Track",
    "nonce": "0x764c6afdd4fd399ae002400b3b4b88a0ebced9d337293b9ca308c43bdf77855f",
    "signature": "0x5d4e4b200f29e7484f57335fdf730b4abe63bf586da483bce9fedd587d5b4b1345415bd0cd3e57d43c0aea3103ded6ac1b948aeeb2f7c7414626dd5c97535ed81b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}