{
  "manageEntity": {
    "action": "Save",
    "entityId": "1082172679",
    "entityType": "Track",
    "nonce": "0x15d431ad3894d434f7d8a1fd941b98e4046621eced0500ce80444b0d4e53f0dd",
    "signature": "0xfbf3f7fc32e42b29023567f83c75cc0ebd143a72e58ac6422283559a775d9686665b6caceac46594720073a00fc1db9542112a12532fda951a9ec91fc6cb596c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}