{
  "manageEntity": {
    "action": "Save",
    "entityId": "910847930",
    "entityType": "Track",
    "nonce": "0x2dc102c53ed6c941e3b3f067bfa0f0d336684beb2ccc996db8405a9fea6de3f2",
    "signature": "0xa3299d4a27bef6e36082bc11d9de81e5d4261846f0612931dec5238686ba23aa683305641b44ffe597d80a6ac83022df865ae96cef4c196b23be3f9b91ecb3511c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}