{
  "manageEntity": {
    "action": "Save",
    "entityId": "299697882",
    "entityType": "Track",
    "nonce": "0x9710bbea91fd1ef722fc3faf0a770bf883451ed789c161f1f063dd4433c415c2",
    "signature": "0x08c3be1229da7ca73d96370ebeab21cc1844ba47a86bf5e3a34493d9a1f4b66d5dfee397177a766453c09f845ad632d0b4f1c29d879f6ba3d29ab16e0b28d9aa1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}