{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689864235",
    "entityType": "Track",
    "nonce": "0x6ac073c497e6bc7d4f82106d9dbd88940f9329cd145746e9c140569a61b70e0d",
    "signature": "0x1b230e719592194fce7652b11a44bb4d37e23c73dd6830f6eb70671b646783084b81985814ade6eeebcfd5b1c59017c80bcb5b965e7064ee28b0eb963d575c881b",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "52309"
  }
}