{
  "manageEntity": {
    "action": "Save",
    "entityId": "2143863016",
    "entityType": "Track",
    "nonce": "0xee5cd16dd63e6d0e0d7b5e69299f918b0135e0a36f8e999625a6b30d8a31f4ba",
    "signature": "0x4fae09d26133c12065a2b9727148cec5b9cfed1708772b5a1ec779d68b5727e60c9fae001afc71700dd4a6098a73b7214db409ae42456fadd700e9a80cfdbe621b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}