{
  "manageEntity": {
    "action": "Save",
    "entityId": "1882740054",
    "entityType": "Track",
    "nonce": "0xc926eb4aa766f70f3657737651c11a4706748b28dd6dab809fb9be80f2d0987b",
    "signature": "0x475fc5d10939c79dfd00157a5b405c6eb741b98403ca029603e0ed78917580674db56326ec6303a8d4f24ee6655da9901b24d0bacaa18ff55d012a3992484f831c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}