{
  "manageEntity": {
    "action": "Save",
    "entityId": "1070010",
    "entityType": "Track",
    "nonce": "0x0d28b8e371cd684a763a26ba40661df7381511bd4ba449a5e752fbadada4d808",
    "signature": "0x485d3f283f45767da883631fac876bdd861eb42b706d31c554055d531c8e854e56deda969a35e1f8193fcc70ea5d889acb85fe3b6c9f3e6b1d310888732e648d1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}